/************************************************************************************
*  Copyright (c), 2014, HelTec Automatic Technology co.,LTD.
*            All rights reserved.
*
* Http:    www.heltec.cn
* Email:   cn.heltec@gmail.com
* WebShop: heltec.taobao.com
*
* File name: OLED_I2C.c
* Project  : HelTec.uvprij
* Processor: STM32F103C8T6
* Compiler : MDK fo ARM
*
* Author : 小林
* Version: 1.00
* Date   : 2014.4.8
* Email  : hello14blog@gmail.com
* Modification: none
*
* Description:128*64点阵的OLED显示屏驱动文件，仅适用于惠特自动化(heltec.taobao.com)的SD1306驱动IIC通信方式显示屏
*
* Others: none;
*
* Function List:
*	1. void I2C_Configuration(void) -- 配置CPU的硬件I2C
* 2. void I2C_WriteByte(uint8_t addr,uint8_t data) -- 向寄存器地址写一个byte的数据
* 3. void WriteCmd(unsigned char I2C_Command) -- 写命令
* 4. void WriteDat(unsigned char I2C_Data) -- 写数据
* 5. void OLED_Init(void) -- OLED屏初始化
* 6. void OLED_SetPos(unsigned char x, unsigned char y) -- 设置起始点坐标
* 7. void OLED_Fill(unsigned char fill_Data) -- 全屏填充
* 8. void OLED_CLS(void) -- 清屏
* 9. void OLED_ON(void) -- 唤醒
* 10. void OLED_OFF(void) -- 睡眠
* 11. void OLED_ShowStr(unsigned char x, unsigned char y, unsigned char ch[], unsigned char TextSize) -- 显示字符串(字体大小有6*8和8*16两种)
* 12. void OLED_ShowCN(unsigned char x, unsigned char y, unsigned char N) -- 显示中文(中文需要先取模，然后放到codetab.h中)
* 13. void OLED_DrawBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char BMP[]) -- BMP图片
*
* History: none;
*
*************************************************************************************/

#include <gy_86.h>
#include "oled.h"
#include "delay.h"
#include "codetab.h"
#include "stm32f10x_i2c.h"
#include "stm32f10x_rcc.h"
#include "soft_iic.h"

#define OLED_ADDR 0x78


void WriteCmd(unsigned char I2C_Command)//写命令
{
	Single_WriteI2C(OLED_ADDR, 0x00, I2C_Command);
}

void WriteDat(unsigned char I2C_Data)//写数据
{
	Single_WriteI2C(OLED_ADDR, 0x40, I2C_Data);
}

void OLED_Init(void) {
	//delay_ms(100); //这里的延时很重要

	WriteCmd(0xAE); //display off
	WriteCmd(0x20);    //Set Memory Addressing Mode
	WriteCmd(
			0x10);    //00,Horizontal Addressing Mode;01,Vertical Addressing Mode;10,Page Addressing Mode (RESET);11,Invalid
	WriteCmd(0xb0);    //Set Page Start Address for Page Addressing Mode,0-7
	WriteCmd(0xc8);    //Set COM Output Scan Direction
	WriteCmd(0x00); //---set low column address
	WriteCmd(0x10); //---set high column address
	WriteCmd(0x40); //--set start line address
	WriteCmd(0x81); //--set contrast control register
	WriteCmd(0xff); //亮度调节 0x00~0xff
	WriteCmd(0xa1); //--set segment re-map 0 to 127
	WriteCmd(0xa6); //--set normal display
	WriteCmd(0xa8); //--set multiplex ratio(1 to 64)
	WriteCmd(0x3F); //
	WriteCmd(0xa4); //0xa4,Output follows RAM content;0xa5,Output ignores RAM content
	WriteCmd(0xd3); //-set display offset
	WriteCmd(0x00); //-not offset
	WriteCmd(0xd5); //--set display clock divide ratio/oscillator frequency
	WriteCmd(0xf0); //--set divide ratio
	WriteCmd(0xd9); //--set pre-charge period
	WriteCmd(0x22); //
	WriteCmd(0xda); //--set com pins hardware configuration
	WriteCmd(0x12);
	WriteCmd(0xdb); //--set vcomh
	WriteCmd(0x20); //0x20,0.77xVcc
	WriteCmd(0x8d); //--set DC-DC enable
	WriteCmd(0x14); //
	WriteCmd(0xaf); //--turn on oled panel
}

void OLED_SetPos(unsigned char x, unsigned char y) //设置起始点坐标
{
	WriteCmd(0xb0 + y);
	WriteCmd(((x & 0xf0) >> 4) | 0x10);
	WriteCmd((x & 0x0f) | 0x01);
}

void OLED_Fill(unsigned char fill_Data)//全屏填充
{
	unsigned char m, n;
	for (m = 0; m < 8; m++) {
		WriteCmd(0xb0 + m);        //page0-page1
		WriteCmd(0x00);        //low column start address
		WriteCmd(0x10);        //high column start address
		for (n = 0; n < 128; n++) {
			WriteDat(fill_Data);
		}
	}
}

void OLED_CLS(void)//清屏
{
	OLED_Fill(0x00);
}

//--------------------------------------------------------------
// Prototype      : void OLED_ON(void)
// Calls          :
// Parameters     : none
// Description    : 将OLED从休眠中唤醒
//--------------------------------------------------------------
void OLED_ON(void) {
	WriteCmd(0X8D);  //设置电荷泵
	WriteCmd(0X14);  //开启电荷泵
	WriteCmd(0XAF);  //OLED唤醒
}

//--------------------------------------------------------------
// Prototype      : void OLED_OFF(void)
// Calls          :
// Parameters     : none
// Description    : 让OLED休眠 -- 休眠模式下,OLED功耗不到10uA
//--------------------------------------------------------------
void OLED_OFF(void) {
	WriteCmd(0X8D);  //设置电荷泵
	WriteCmd(0X10);  //关闭电荷泵
	WriteCmd(0XAE);  //OLED休眠
}

//--------------------------------------------------------------
// Prototype      : void OLED_ShowChar(unsigned char x, unsigned char y, unsigned char ch[], unsigned char TextSize)
// Calls          :
// Parameters     : x,y -- 起始点坐标(x:0~127, y:0~7); ch[] -- 要显示的字符串; TextSize -- 字符大小(1:6*8 ; 2:8*16)
// Description    : 显示codetab.h中的ASCII字符,有6*8和8*16可选择
//--------------------------------------------------------------
void OLED_ShowStr(unsigned char x, unsigned char y, char ch[], unsigned char TextSize) {
	unsigned char c = 0, i = 0, j = 0;
	switch (TextSize) {
		case 1: {
			while (ch[j] != '\0') {
				c = ch[j] - 32;
				if (x > 126) {
					x = 0;
					y++;
				}
				OLED_SetPos(x, y);
				for (i = 0; i < 6; i++)
					WriteDat(F6x8[c][i]);
				x += 6;
				j++;
			}
		}
			break;
		case 2: {
			while (ch[j] != '\0') {
				c = ch[j] - 32;
				if (x > 120) {
					x = 0;
					y++;
				}
				OLED_SetPos(x, y);
				for (i = 0; i < 8; i++)
					WriteDat(F8X16[c * 16 + i]);
				OLED_SetPos(x, y + 1);
				for (i = 0; i < 8; i++)
					WriteDat(F8X16[c * 16 + i + 8]);
				x += 8;
				j++;
			}
		}
			break;
	}
}

//--------------------------------------------------------------
// Prototype      : void OLED_ShowCN(unsigned char x, unsigned char y, unsigned char N)
// Calls          :
// Parameters     : x,y -- 起始点坐标(x:0~127, y:0~7); N:汉字在codetab.h中的索引
// Description    : 显示codetab.h中的汉字,16*16点阵
//--------------------------------------------------------------
void OLED_ShowCN(unsigned char x, unsigned char y, unsigned char N) {
	unsigned char wm = 0;
	unsigned int adder = 32 * N;
	OLED_SetPos(x, y);
	for (wm = 0; wm < 16; wm++) {
		WriteDat(F16x16[adder]);
		adder += 1;
	}
	OLED_SetPos(x, y + 1);
	for (wm = 0; wm < 16; wm++) {
		WriteDat(F16x16[adder]);
		adder += 1;
	}
}

//--------------------------------------------------------------
// Prototype      : void OLED_DrawBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char BMP[]);
// Calls          :
// Parameters     : x0,y0 -- 起始点坐标(x0:0~127, y0:0~7); x1,y1 -- 起点对角线(结束点)的坐标(x1:1~128,y1:1~8)
// Description    : 显示BMP位图
//--------------------------------------------------------------
void OLED_DrawBMP(unsigned char x0, unsigned char y0, unsigned char x1, unsigned char y1, unsigned char BMP[]) {
	unsigned int j = 0;
	unsigned char x, y;

	if (y1 % 8 == 0)
		y = y1 / 8;
	else
		y = y1 / 8 + 1;
	for (y = y0; y < y1; y++) {
		OLED_SetPos(x0, y);
		for (x = x0; x < x1; x++) {
			WriteDat(BMP[j++]);
		}
	}
}
